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Review for Third Trimonthly
Topic 16
By:EMMA,MAU AND ALEJANDRO
Understanding Ratios
16-1
There are 3 forms to write the ratio the first one is 4 to 2 the 2nd one is 4:2 and the 3rd one is like a fraction 4/2.
We will put you an example for you to understand.
Juan has 9 balls this are the colors:3 black , 4 red and 2 blue .Write each ratio.
Red balls to blue balls
4 to 2, 4:2, 4/2
Understanding Percent
16-2
A percent is a special kind of ratio that shows the relationship
between a number and
between a number and
We have to figure out the percent of a number, divide the number by the whole and multiply by 100.
Example:
Write the ratio and percent of the shaded section of the grid .
Answer:
16-3
PERCENTS,FRACTIONS,AND DECIMALS
You can change percents into and decimals just like fractions and decimals into percents.
To change a percent into a fraction, drop the percent sign and
place the number over 100. Simplify fraction if possible
place the number over 100. Simplify fraction if possible
Finding percent of a whole number.
To find the percentage of a number you have to put the number of percent in hundreths for example 17% of 76 is 0.17 x 76.